rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=603/1/0x4000000000000000 softirq=15785/15786 fqs=6
(t=10502 jiffies g=21849 q=49)
rcu: rcu_preempt kthread starved for 10491 jiffies! g21849 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:28952 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4940 [inline]
__schedule+0xb44/0x5960 kernel/sched/core.c:6287
schedule+0xd3/0x270 kernel/sched/core.c:6366
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x800 kernel/rcu/tree.c:1957
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2130
kthread+0x3e5/0x4d0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10366 Comm: syz-executor.5 Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__vmcs_readl arch/x86/kvm/vmx/vmx_ops.h:74 [inline]
RIP: 0010:vmcs_read32 arch/x86/kvm/vmx/vmx_ops.h:119 [inline]
RIP: 0010:vmx_read_guest_seg_ar+0xef/0x1a0 arch/x86/kvm/vmx/vmx.c:714
Code: e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 9c 00 00 00 48 89 d8 48 c1 e0 04 44 8b a0 ec b1 84 89 66 90 e8 a5 b3 57 00 45 0f 78 e4 <3e> 77 0d 6a 00 41 54 e8 05 a9 02 00 41 5c 41 5c e8 8c b3 57 00 48
RSP: 0018:ffffc90000fd89c0 EFLAGS: 00000002
RAX: 0000000080010001 RBX: 0000000000000002 RCX: 0000000000000000
RDX: ffff88808b32e140 RSI: ffffffff811e5aeb RDI: ffffffff8984b20c
RBP: ffff88807b410340 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff811e5a36 R11: 0000000000000000 R12: 0000000000000093
R13: ffff88808811e0c0 R14: ffffc90000fd8b24 R15: ffffc90000fd8b20
FS: 00007fe676a1f700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000019d6f000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
vmx_get_cpl+0x57/0x90 arch/x86/kvm/vmx/vmx.c:3268
kvm_is_user_mode+0x5e/0x80 arch/x86/kvm/x86.c:8298
perf_misc_flags+0x14a/0x1b0 arch/x86/events/core.c:2959
perf_prepare_sample+0x173/0x1e70 kernel/events/core.c:7307
__perf_event_output kernel/events/core.c:7487 [inline]
perf_event_output_forward+0xda/0x280 kernel/events/core.c:7507
__perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9177
perf_swevent_hrtimer+0x37c/0x3f0 kernel/events/core.c:10567
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:vmx_do_interrupt_nmi_irqoff+0x10/0x20 arch/x86/kvm/vmx/vmenter.S:327
Code: 41 5b 41 5a 41 59 41 58 5e 5f 5a 59 58 5d c3 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 48 83 e4 f0 6a 18 55 9c 6a 10 ff d7 <48> 89 ec 5d c3 cc cc cc cc cc cc cc cc cc cc cc 41 57 48 8d 47 08
RSP: 0018:ffffc9000404fb48 EFLAGS: 00000082
RAX: 0000000000000001 RBX: ffff88807b410340 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89400bf0
RBP: ffffc9000404fb48 R08: 0000000080000000 R09: ffff88807b4105a7
R10: ffffffff811e9bac R11: 0000000000000000 R12: 0000000000000bf0
R13: 0000000089400000 R14: 0000000000000000 R15: ffff88807b410370
handle_interrupt_nmi_irqoff arch/x86/kvm/vmx/vmx.c:6349 [inline]
handle_external_interrupt_irqoff arch/x86/kvm/vmx/vmx.c:6379 [inline]
vmx_handle_exit_irqoff arch/x86/kvm/vmx/vmx.c:6390 [inline]
vmx_handle_exit_irqoff+0x4d2/0x750 arch/x86/kvm/vmx/vmx.c:6382
vcpu_enter_guest+0x2698/0x4410 arch/x86/kvm/x86.c:9684
vcpu_run arch/x86/kvm/x86.c:9802 [inline]
kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10034
kvm_vcpu_ioctl+0x570/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3779
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe6794a9a39
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe676a1f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe6795acf60 RCX: 00007fe6794a9a39
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fe679503c5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd1d0c884f R14: 00007fe676a1f300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 10371 Comm: syz-executor.1 Not tainted 5.15.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3880 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2599
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode+0x2e/0x40 kernel/kcov.c:174
Code: e9 8b 7e 89 c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 64 15 00 00 85 d2 74 0b 8b 86 40 15 00 00 39 f8 <0f> 94 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 31 c0 65 8b
RSP: 0018:ffffc90002d47b20 EFLAGS: 00000297
RAX: 0000000000000002 RBX: ffff88808b9fc600 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88808671c140 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81110dcc R11: 0000000000000000 R12: ffff88808b9fd3a0
R13: 0000000000000000 R14: ffff88808b9fc8b0 R15: 0000000000000000
write_comp_data kernel/kcov.c:218 [inline]
__sanitizer_cov_trace_const_cmp4+0x1c/0x70 kernel/kcov.c:284
inject_pending_event+0x3bc/0x14b0 arch/x86/kvm/x86.c:8969
vcpu_enter_guest+0xd93/0x4410 arch/x86/kvm/x86.c:9558
vcpu_run arch/x86/kvm/x86.c:9802 [inline]
kvm_arch_vcpu_ioctl_run+0x47c/0x1b10 arch/x86/kvm/x86.c:10034
kvm_vcpu_ioctl+0x570/0xf30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3779
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl fs/ioctl.c:860 [inline]
__x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9e31d36a39
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9e2f2ac188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9e31e39f60 RCX: 00007f9e31d36a39
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f9e31d90c5f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffc9f0f04f R14: 00007f9e2f2ac300 R15: 0000000000022000
sched: RT throttling activated
----------------
Code disassembly (best guess):
0: e0 07 loopne 0x9
2: 83 c0 03 add $0x3,%eax
5: 38 d0 cmp %dl,%al
7: 7c 08 jl 0x11
9: 84 d2 test %dl,%dl
b: 0f 85 9c 00 00 00 jne 0xad
11: 48 89 d8 mov %rbx,%rax
14: 48 c1 e0 04 shl $0x4,%rax
18: 44 8b a0 ec b1 84 89 mov -0x767b4e14(%rax),%r12d
1f: 66 90 xchg %ax,%ax
21: e8 a5 b3 57 00 callq 0x57b3cb
26: 45 0f 78 e4 vmread %r12,%r12
* 2a: 3e 77 0d ja,pt 0x3a <-- trapping instruction
2d: 6a 00 pushq $0x0
2f: 41 54 push %r12
31: e8 05 a9 02 00 callq 0x2a93b
36: 41 5c pop %r12
38: 41 5c pop %r12
3a: e8 8c b3 57 00 callq 0x57b3cb
3f: 48 rex.W